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  1. #include <iostream>
  2. #include <vector>
  3. #include <bits/stdc++.h>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	// your code goes here
  8.  
  9. 	int n;//array ka size
  10. 	cin>>n;
  11.  
  12. 	vector<int>arr(n);
  13. 	unordered_map<int,int>mpp;
  14.  
  15. 	for(int i=0;i<n;i++){
  16. 		cin>>arr[i];
  17. 		mpp[arr[i]]++;
  18. 	}
  19. 	int q;//number of queries
  20. 	cin>>q;
  21. 	for(int i=0;i<q;i++){
  22. 		int query;
  23. 		cin>>query;
  24. 		cout<<mpp[query]<<endl;
  25. 	}
  26. 	return 0;
  27.  
  28.  
  29. }
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin 
3
2
2
1
2
2
3
stdout 
2
0
https://ideone.com/uIjZzR
hashing -q1(hash map)
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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